Sounds like he took his own life
http://www.bbc.co.uk/news/entertainment-arts-35787187
Keith Emerson, the co-founder and keyboardist of progressive rock group Emerson, Lake and Palmer, has died aged 71, according to his former band mates.
"We regret to announce that Keith Emerson died last night at his home in Santa Monica, Los Angeles," read a statement on the band's Facebook page.
Emerson was considered one of the top keyboard players of the prog rock era.
He died of a self-inflicted gunshot wound to the head, Santa Monica police confirmed to the BBC.
His death was being investigated as a suicide, police added.